On Monday evening British police responded to an explosion that took place outside of Ariana Grande's concert in Manchester, England, at the Manchester Arena. While Grande herself has been reported safe, a preliminary death toll has been announced, and authorities are still responding to and investigating the scene.

An explosion took place at 10:30 p.m. just right after Grande's performance ended. Even though the explosion did not happen inside the Manchester Arena, it reportedly took place just outside in a public space near the foyer of the arena, according to The Guardian. The Guardian is also reporting that the explosion has been suspected as a terrorist attack.

Police also confirmed that at least 19 people have been killed with another 50 people injured. The incident is currently being treated as a terrorist incident as the police continue their investigation.

Facebook has activated its "safe check" feature for people who were at the concert or near the scene can let loved ones know they are safe. However, there are still people searching for friends and family who have not been located after the explosion.

A statement from the Greater Manchester Police read:

Emergency services are currently responding to reports of an explosion at Manchester Arena. There are a number of confirmed fatalities and others injured. Please AVOID the area as first responders work tirelessly at the scene.

Several celebrities have already taken to Twitter to express their concern for Grande as well as the victims of the explosion.

Taylor Swift

Kendall Jenner

Lorde

Reese Witherspoon

Anna Kendrick

Harry Styles

Lea Michele

John Legend

Billy Ray Cyrus

Chelsea Handler

Brie Larson

Chrissy Teigen

HAIM

James Charles

Fifth Harmony

Cher

Katy Perry

Ellie Goulding

Ryan Seacrest

One Republic

Demi Lovato

Dwayne Johnson

Billboard has reported that Grande's rep says she is OK while her team is also actively investigating what happened at the end of her show.

Our hearts and prayers go out to all of the innocent victims that had to witness this act of terror.